# Copyright The IETF Trust 2018-2020, All Rights Reserved
# -*- coding: utf-8 -*-
# Copied from https://github.com/sphinx-doc/sphinx/blob/master/sphinx/util/texescape.py
# Copyright and license as indicated in the original and below


"""
    sphinx.util.texescape
    ~~~~~~~~~~~~~~~~~~~~~

    TeX escaping helper.

    :copyright: Copyright 2007-2018 by the Sphinx team, see AUTHORS.
    :license: BSD, see LICENSE for details.
"""



tex_replacements = [
    # map TeX special chars
    ('$', r'\$'),
    ('%', r'\%'),
    ('&', r'\&'),
    ('#', r'\#'),
    ('_', r'\_'),
    ('{', r'\{'),
    ('}', r'\}'),
    ('[', r'{[}'),
    (']', r'{]}'),
    ('`', r'{}`'),
    ('\\', r'\textbackslash{}'),
    ('~', r'\textasciitilde{}'),
    ('<', r'\textless{}'),
    ('>', r'\textgreater{}'),
    ('^', r'\textasciicircum{}'),
    # map special Unicode characters to TeX commands
    ('¶', r'\P{}'),
    ('§', r'\S{}'),
    ('€', r'\texteuro{}'),
    ('∞', r'\(\infty\)'),
    ('±', r'\(\pm\)'),
    ('→', r'\(\rightarrow\)'),
    ('‣', r'\(\rightarrow\)'),
    ('✓', r'\(\checkmark\)'),
    # used to separate -- in options
    ('', r'{}'),
    # map some special Unicode characters to similar ASCII ones
    ('⎽', r'\_'),
    ('–', r'\textendash{}'),
    ('|', r'\textbar{}'),
    ('ℯ', r'e'),
    ('ⅈ', r'i'),
    ('⁰', r'\(\sp{\text{0}}\)'),
    ('¹', r'\(\sp{\text{1}}\)'),
    ('²', r'\(\sp{\text{2}}\)'),
    ('³', r'\(\sp{\text{3}}\)'),
    ('⁴', r'\(\sp{\text{4}}\)'),
    ('⁵', r'\(\sp{\text{5}}\)'),
    ('⁶', r'\(\sp{\text{6}}\)'),
    ('⁷', r'\(\sp{\text{7}}\)'),
    ('⁸', r'\(\sp{\text{8}}\)'),
    ('⁹', r'\(\sp{\text{9}}\)'),
    ('₀', r'\(\sb{\text{0}}\)'),
    ('₁', r'\(\sb{\text{1}}\)'),
    ('₂', r'\(\sb{\text{2}}\)'),
    ('₃', r'\(\sb{\text{3}}\)'),
    ('₄', r'\(\sb{\text{4}}\)'),
    ('₅', r'\(\sb{\text{5}}\)'),
    ('₆', r'\(\sb{\text{6}}\)'),
    ('₇', r'\(\sb{\text{7}}\)'),
    ('₈', r'\(\sb{\text{8}}\)'),
    ('₉', r'\(\sb{\text{9}}\)'),
    # map Greek alphabet
    ('α', r'\(\alpha\)'),
    ('β', r'\(\beta\)'),
    ('γ', r'\(\gamma\)'),
    ('δ', r'\(\delta\)'),
    ('ε', r'\(\epsilon\)'),
    ('ζ', r'\(\zeta\)'),
    ('η', r'\(\eta\)'),
    ('θ', r'\(\theta\)'),
    ('ι', r'\(\iota\)'),
    ('κ', r'\(\kappa\)'),
    ('λ', r'\(\lambda\)'),
    ('μ', r'\(\mu\)'),
    ('ν', r'\(\nu\)'),
    ('ξ', r'\(\xi\)'),
    ('ο', r'o'),
    ('π', r'\(\pi\)'),
    ('ρ', r'\(\rho\)'),
    ('σ', r'\(\sigma\)'),
    ('τ', r'\(\tau\)'),
    ('υ', '\\(\\upsilon\\)'),
    ('φ', r'\(\phi\)'),
    ('χ', r'\(\chi\)'),
    ('ψ', r'\(\psi\)'),
    ('ω', r'\(\omega\)'),
    ('Α', r'A'),
    ('Β', r'B'),
    ('Γ', r'\(\Gamma\)'),
    ('Δ', r'\(\Delta\)'),
    ('Ε', r'E'),
    ('Ζ', r'Z'),
    ('Η', r'H'),
    ('Θ', r'\(\Theta\)'),
    ('Ι', r'I'),
    ('Κ', r'K'),
    ('Λ', r'\(\Lambda\)'),
    ('Μ', r'M'),
    ('Ν', r'N'),
    ('Ξ', r'\(\Xi\)'),
    ('Ο', r'O'),
    ('Π', r'\(\Pi\)'),
    ('Ρ', r'P'),
    ('Σ', r'\(\Sigma\)'),
    ('Τ', r'T'),
    ('Υ', '\\(\\Upsilon\\)'),
    ('Φ', r'\(\Phi\)'),
    ('Χ', r'X'),
    ('Ψ', r'\(\Psi\)'),
    ('Ω', r'\(\Omega\)'),
    ('Ω', r'\(\Omega\)'),
]

tex_escape_map = {}
tex_replace_map = {}
tex_hl_escape_map_new = {}


def init():
    # type: () -> None
    for a, b in tex_replacements:
        tex_escape_map[ord(a)] = b
        tex_replace_map[ord(a)] = '_'

    for a, b in tex_replacements:
        if a in '[]{}\\':
            continue
        tex_hl_escape_map_new[ord(a)] = b